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Node.java
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/*BEGIN_COPYRIGHT_BLOCK
*
* Copyright (c) 2001-2010, JavaPLT group at Rice University (drjava@rice.edu)
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the names of DrJava, the JavaPLT group, Rice University, nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* This software is Open Source Initiative approved Open Source Software.
* Open Source Initative Approved is a trademark of the Open Source Initiative.
*
* This file is part of DrJava. Download the current version of this project
* from http://www.drjava.org/ or http://sourceforge.net/projects/drjava/
*
* END_COPYRIGHT_BLOCK*/
/*
* DynamicJava - Copyright (C) 1999-2001
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to permit
* persons to whom the Software is furnished to do so, subject to the
* following conditions:
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL DYADE BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Except as contained in this notice, the name of Dyade shall not be
* used in advertising or otherwise to promote the sale, use or other
* dealings in this Software without prior written authorization from
* Dyade.
*
*/
package koala.dynamicjava.tree;
import java.util.*;
import koala.dynamicjava.tree.visitor.*;
/**
* This class represents the nodes of the syntax tree
*
* @author Stephane Hillion
* @version 1.1 - 1999/11/12
*/
public abstract class Node implements SourceInfo.Wrapper {
private final Map<String,Object> properties;
private SourceInfo sourceInfo;
protected Node(SourceInfo si) {
assert si != null;
sourceInfo = si;
properties = new HashMap<String, Object>();
}
/** Returns the sourceInfo. */
public SourceInfo getSourceInfo() {
return sourceInfo;
}
/**
* Sets the filename
*/
public void setSourceInfo(SourceInfo si) {
assert si != null;
sourceInfo = si;
}
// Properties support //////////////////////////////////////////////////
/**
* Sets the value of a property
* @param name the property name
* @param value the new value to set
*/
public void setProperty(String name, Object value) {
properties.put(name, value);
}
/**
* Returns the value of a property
* @param name the property name
* @return null if the property was not previously set
*/
public Object getProperty(String name) {
if (!properties.containsKey(name)) {
throw new IllegalStateException("Property '" + name + "' is not initialized");
}
return properties.get(name);
}
/**
* Returns the defined properties for this node.
* @return a set of string
*/
public Set<String> getProperties() {
return properties.keySet();
}
/**
* Returns true if a property is defined for this node
* @param name the name of the property
*/
public boolean hasProperty(String name) {
return properties.containsKey(name);
}
/** Change the names of all properties by prefixing each name with the given string. */
public void archiveProperties(String prefix) {
Map<String, Object> newProps = new HashMap<String, Object>();
for (Map.Entry<String, Object> e : properties.entrySet()) { newProps.put(prefix + e.getKey(), e.getValue()); }
properties.clear();
properties.putAll(newProps);
}
/**
* Allows a visitor to traverse the tree
* @param visitor the visitor to accept
*/
public abstract <T> T acceptVisitor(Visitor<T> visitor);
}