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/* |
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* The Apache Software License, Version 1.1 |
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* |
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* Copyright (c) 2002 The Apache Software Foundation. All rights |
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* reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* 3. The end-user documentation included with the redistribution, if |
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* any, must include the following acknowlegement: |
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* "This product includes software developed by the |
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* Apache Software Foundation (http://www.apache.org/)." |
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* Alternately, this acknowlegement may appear in the software itself, |
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* if and wherever such third-party acknowlegements normally appear. |
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* |
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* 4. The names "The Jakarta Project", "Ant", and "Apache Software |
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* Foundation" must not be used to endorse or promote products derived |
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* from this software without prior written permission. For written |
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* permission, please contact apache@apache.org. |
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* |
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* 5. Products derived from this software may not be called "Apache" |
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* nor may "Apache" appear in their names without prior written |
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* permission of the Apache Group. |
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* |
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* ==================================================================== |
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* |
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* This software consists of voluntary contributions made by many |
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* individuals on behalf of the Apache Software Foundation. For more |
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* information on the Apache Software Foundation, please see |
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* <http://www.apache.org/>. |
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*/ |
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package org.apache.ant.antcore.model; |
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import java.net.URL; |
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import java.util.ArrayList; |
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import java.util.HashMap; |
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import java.util.HashSet; |
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import java.util.Iterator; |
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import java.util.List; |
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import java.util.Map; |
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import java.util.Set; |
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import java.util.StringTokenizer; |
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import org.apache.ant.common.util.Location; |
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import org.apache.ant.antcore.util.CircularDependencyChecker; |
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import org.apache.ant.antcore.util.CircularDependencyException; |
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import org.apache.ant.antcore.util.ConfigException; |
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/** |
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* A project is a collection of targets and global tasks. A project may |
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* reference objects in other projects using named references of the form |
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* refname:object |
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* |
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* @author <a href="mailto:conor@apache.org">Conor MacNeill</a> |
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* @created 9 January 2002 |
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*/ |
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public class Project extends ModelElement { |
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/** |
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* The delimiter used to separate reference names in target names, data |
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* values, etc |
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*/ |
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public final static String REF_DELIMITER = ":"; |
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/** The default target in this project. */ |
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private String defaultTarget = null; |
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/** |
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* The base URL of this project. Relative locations are relative to this |
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* base. |
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*/ |
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private String base; |
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/** |
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* The name of this project when referenced by a script within this |
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* project. |
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*/ |
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private String name; |
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/** |
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* These are the targets which belong to the project. They will have |
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* interdependencies which are used to determine which targets need to |
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* be executed before a given target. |
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*/ |
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private Map targets = new HashMap(); |
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/** |
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* The global tasks for this project. These are the tasks that will get |
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* executed whenever an execution context is associated with this |
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* project. |
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*/ |
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private List tasks = new ArrayList(); |
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/** |
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* The projects referenced into this project. Each referenced project is |
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* given a name which is used to identify access to that project's |
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* elements. |
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*/ |
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private Map referencedProjects = new HashMap(); |
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/** The URL where the project is defined. */ |
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private URL sourceURL; |
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/** |
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* Create a Project |
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* |
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* @param sourceURL the URL where the project is defined. |
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* @param location the location of this element within the source. |
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*/ |
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public Project(URL sourceURL, Location location) { |
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super(location); |
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this.sourceURL = sourceURL; |
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} |
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/** |
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* Set the defautl target of this project. |
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* |
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* @param defaultTarget the name of the defaultTarget of this project. |
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*/ |
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public void setDefaultTarget(String defaultTarget) { |
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this.defaultTarget = defaultTarget; |
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} |
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/** |
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* Set the base URL for this project. |
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* |
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* @param base the baseURL for this project. |
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*/ |
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public void setBase(String base) { |
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this.base = base; |
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} |
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/** |
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* Set the name of this project. |
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* |
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* @param name the name for this project. |
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*/ |
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public void setName(String name) { |
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this.name = name; |
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} |
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/** |
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* Get the URL where this project is defined |
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* |
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* @return the project source URL |
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*/ |
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public URL getSourceURL() { |
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return sourceURL; |
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} |
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/** |
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* Get the Project's default Target, if any |
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* |
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* @return the project's defautl target or null if there is no default. |
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*/ |
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public String getDefaultTarget() { |
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return defaultTarget; |
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} |
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/** |
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* Get the base URL for this project. |
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* |
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* @return the baseURL for this project as a string. |
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*/ |
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public String getBase() { |
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return base; |
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} |
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/** |
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* Get the targets in this project. |
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* |
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* @return an iterator returning Target objects. |
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*/ |
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public Iterator getTargets() { |
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return targets.values().iterator(); |
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} |
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/** |
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* Get the target with the given name |
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* |
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* @param targetName the name of the desired target. |
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* @return the target with the given name or null if there is no such |
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* target. |
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*/ |
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public Target getTarget(String targetName) { |
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return (Target)targets.get(targetName); |
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} |
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/** |
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* Get the names of the referenced projects. |
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* |
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* @return an iterator which returns the name sof the referenced |
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* projects. |
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*/ |
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public Iterator getReferencedProjectNames() { |
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return referencedProjects.keySet().iterator(); |
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} |
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/** |
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* Get a referenced project by name |
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* |
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* @param alias the name under which the project was referenced. |
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* @return the project asscociated with the given reference alias or |
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* null if there is no such project. |
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*/ |
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public Project getReferencedProject(String alias) { |
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return (Project)referencedProjects.get(alias); |
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} |
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/** |
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* Get the initialisation tasks for this project |
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* |
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* @return an iterator over the set of tasks for this project. |
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*/ |
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public Iterator getTasks() { |
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return tasks.iterator(); |
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} |
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/** |
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* Get a target by its reference name - references may span multiple |
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* references. |
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* |
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* @param fullTargetName The name of the target relative to this project |
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* @return the Target object with the given name |
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*/ |
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public Target getRefTarget(String fullTargetName) { |
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Project containingProject = getRefProject(fullTargetName); |
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if (containingProject == this) { |
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return getTarget(fullTargetName); |
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} |
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int index = fullTargetName.lastIndexOf(REF_DELIMITER); |
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String targetName |
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= fullTargetName.substring(index + REF_DELIMITER.length()); |
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return containingProject.getTarget(targetName); |
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} |
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/** |
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* Get the project which directly contains the target specified by its |
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* full name. |
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* |
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* @param fullTargetName the full name of the target for which the |
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* containing project is required. |
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* @return The RefProject value |
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*/ |
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public Project getRefProject(String fullTargetName) { |
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int index = fullTargetName.lastIndexOf(REF_DELIMITER); |
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if (index == -1) { |
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return this; |
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} |
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Project currentProject = this; |
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String relativeName = fullTargetName.substring(0, index); |
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StringTokenizer tokenizer |
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= new StringTokenizer(relativeName, REF_DELIMITER); |
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while (tokenizer.hasMoreTokens()) { |
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String refName = tokenizer.nextToken(); |
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currentProject = currentProject.getReferencedProject(refName); |
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if (currentProject == null) { |
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return null; |
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} |
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} |
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return currentProject; |
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} |
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/** |
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* get the list of dependent targets which must be evaluated for the |
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* given target. |
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* |
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* @param fullTargetName the full name (in reference space) of the |
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* target |
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* @return the flattened list of targets |
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* @exception ConfigException if the given target could not be found |
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*/ |
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public List getTargetDependencies(String fullTargetName) |
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throws ConfigException { |
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try { |
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List flattenedList = new ArrayList(); |
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flattenDependency(flattenedList, fullTargetName); |
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flattenedList.add(fullTargetName); |
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return flattenedList; |
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} catch (ConfigException e) { |
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throw new ConfigException(fullTargetName |
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+ " does not exist in project"); |
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} |
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} |
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/** |
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* Add a target to the project. |
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* |
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* @param target the Target to be added |
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* @throws ModelException if a target with the same name already exists. |
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*/ |
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public void addTarget(Target target) throws ModelException { |
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if (targets.containsKey(target.getName())) { |
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throw new ModelException("A target with name '" |
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+ target.getName() + |
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"' has already been defined in this project", |
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target.getLocation()); |
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} |
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targets.put(target.getName(), target); |
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} |
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/** |
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* Add a task to the list of global tasks for this project. |
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* |
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* @param task a task to be executed when an execution context is |
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* associated with the Project (a non-target task) |
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*/ |
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public void addTask(BuildElement task) { |
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tasks.add(task); |
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} |
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/** |
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* Reference a project using the given name. |
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* |
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* @param referenceName the name under which the project will be |
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* referenced. |
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* @param project the referenced project. |
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* @throws ModelException if an existing project has already been |
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* referenced with that name. |
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*/ |
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public void referenceProject(String referenceName, Project project) |
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throws ModelException { |
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if (referencedProjects.containsKey(referenceName)) { |
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throw new ModelException("A project has already been " |
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+ "introduced with name '" + referenceName + "'"); |
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} |
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referencedProjects.put(referenceName, project); |
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} |
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/** |
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* Validate that this build element is configured correctly |
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* |
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* @param globalName The name of this project in the reference name |
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* space |
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* @exception ModelException if the element is invalid |
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*/ |
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public void validate(String globalName) throws ModelException { |
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if (defaultTarget == null) { |
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throw new ModelException("Project must have a default " |
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+ "attribute", getLocation()); |
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} |
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Set keys = referencedProjects.keySet(); |
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for (Iterator i = keys.iterator(); i.hasNext(); ) { |
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String refName = (String)i.next(); |
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Project referencedProject |
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= (Project)referencedProjects.get(refName); |
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String refGlobalName = refName; |
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if (globalName != null) { |
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refGlobalName = globalName + REF_DELIMITER + refName; |
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} |
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referencedProject.validate(refGlobalName); |
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} |
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// we now check whether all of dependencies for our targets |
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// exist in the model |
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// visited contains the targets we have already visited and verified |
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Set visited = new HashSet(); |
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// checker records the targets we are currently visiting |
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CircularDependencyChecker checker |
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= new CircularDependencyChecker("checking target dependencies"); |
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// dependency order is purely recorded for debug purposes |
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List dependencyOrder = new ArrayList(); |
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for (Iterator i = getTargets(); i.hasNext(); ) { |
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Target target = (Target)i.next(); |
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target.validate(); |
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fillinDependencyOrder(globalName, target, dependencyOrder, |
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visited, checker); |
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} |
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} |
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/** |
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* Determine target dependency order within this porject and verify that |
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* references to targets in other projects are valid |
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* |
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* @param globalName The global name of this project |
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* @param target The target being examined |
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* @param dependencyOrder The dependency order of targets |
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* @param visited Set of targets in this project already visited. |
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* @param checker A circular dependency checker |
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* @exception ModelException if the dependencies of the project's |
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* targets are not valid. |
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*/ |
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public void fillinDependencyOrder(String globalName, Target target, |
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List dependencyOrder, Set visited, |
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CircularDependencyChecker checker) |
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throws ModelException { |
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if (visited.contains(target.getName())) { |
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return; |
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} |
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try { |
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String targetName = target.getName(); |
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String targetGlobalName = targetName; |
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if (globalName != null) { |
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targetGlobalName = globalName + REF_DELIMITER + targetName; |
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} |
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checker.visitNode(targetGlobalName); |
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for (Iterator i = target.getDependencies(); i.hasNext(); ) { |
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String dependency = (String)i.next(); |
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boolean localTarget = (dependency.indexOf(REF_DELIMITER) == -1); |
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Target dependencyTarget |
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= localTarget ? getTarget(dependency) |
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: getRefTarget(dependency); |
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if (dependencyTarget == null) { |
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StringBuffer sb = new StringBuffer("Target '"); |
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if (globalName != null) { |
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sb.append(globalName + REF_DELIMITER); |
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} |
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sb.append(dependency); |
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sb.append("' does not exist in this project. "); |
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throw new ModelException(new String(sb), |
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target.getLocation()); |
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} |
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if (localTarget) { |
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// need to check the targets we depend on |
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fillinDependencyOrder(globalName, dependencyTarget, |
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dependencyOrder, visited, checker); |
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} |
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} |
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visited.add(targetName); |
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checker.leaveNode(targetGlobalName); |
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dependencyOrder.add(targetName); |
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|
} catch (CircularDependencyException e) { |
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|
throw new ModelException(e.getMessage(), |
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|
target.getLocation()); |
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|
} |
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} |
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|
/** |
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|
|
* Given a fully qualified target name, this method simply returns the |
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|
|
* fully qualified name of the project |
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|
* |
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|
|
* @param fullTargetName the full qualified target name |
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|
|
* @return the full name of the containing project |
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|
|
*/ |
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|
private String getFullProjectName(String fullTargetName) { |
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|
int index = fullTargetName.lastIndexOf(REF_DELIMITER); |
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|
if (index == -1) { |
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|
return null; |
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} |
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|
return fullTargetName.substring(0, index); |
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} |
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|
|
/** |
|
|
|
|
|
* Flatten the dependencies to the given target |
|
|
|
|
|
* |
|
|
|
|
|
* @param flattenedList the List of targets that must be executed before |
|
|
|
|
|
* the given target |
|
|
|
|
|
* @param fullTargetName the fully qualified name of the target |
|
|
|
|
|
* @exception ConfigException if the given target does not exist in the |
|
|
|
|
|
* project hierarchy |
|
|
|
|
|
*/ |
|
|
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|
|
private void flattenDependency(List flattenedList, String fullTargetName) |
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|
|
throws ConfigException { |
|
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|
|
if (flattenedList.contains(fullTargetName)) { |
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|
|
return; |
|
|
|
|
|
} |
|
|
|
|
|
Project containingProject = getRefProject(fullTargetName); |
|
|
|
|
|
String fullProjectName = getFullProjectName(fullTargetName); |
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|
|
Target target = getRefTarget(fullTargetName); |
|
|
|
|
|
if (target == null) { |
|
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|
|
throw new ConfigException("Target " + fullTargetName |
|
|
|
|
|
+ " does not exist"); |
|
|
|
|
|
} |
|
|
|
|
|
for (Iterator i = target.getDependencies(); i.hasNext(); ) { |
|
|
|
|
|
String localDependencyName = (String)i.next(); |
|
|
|
|
|
String fullDependencyName |
|
|
|
|
|
= fullProjectName == null ? localDependencyName |
|
|
|
|
|
: fullProjectName + REF_DELIMITER + localDependencyName; |
|
|
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|
|
flattenDependency(flattenedList, fullDependencyName); |
|
|
|
|
|
flattenedList.add(fullDependencyName); |
|
|
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|
|
} |
|
|
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|
|
} |
|
|
|
|
|
} |
|
|
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|
Conor MacNeill