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/*
* Copyright 1999-2004 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* $Id$ */
package org.apache.fop.fo.properties;
import java.util.Vector;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.fop.datatypes.Length;
import org.apache.fop.datatypes.Numeric;
/**
* Base class for all property objects
* @author unascribed
*/
public class Property {
protected static Log log = LogFactory.getLog(PropertyMaker.class);
/**
* The original specified value for properties which inherit
* specified values.
*/
private String specVal;
/**
* Set the original value specified for the property attribute.
* @param specVal The specified value.
*/
public void setSpecifiedValue(String specVal) {
this.specVal = specVal;
}
/**
* Return the original value specified for the property attribute.
* @return The specified value as a String.
*/
public String getSpecifiedValue() {
return specVal;
}
/*
* This section contains accessor functions for all possible Property datatypes
*/
/**
* This method expects to be overridden by subclasses
* @return Length property value
*/
public Length getLength() {
return null;
}
/**
* This method expects to be overridden by subclasses
* @return ColorType property value
*/
public ColorTypeProperty getColorType() {
return null;
}
/**
* This method expects to be overridden by subclasses
* @return CondLength property value
*/
public CondLengthProperty getCondLength() {
return null;
}
/**
* This method expects to be overridden by subclasses
* @return LenghtRange property value
*/
public LengthRangeProperty getLengthRange() {
return null;
}
/**
* This method expects to be overridden by subclasses
* @return LengthPair property value
*/
public LengthPairProperty getLengthPair() {
return null;
}
/**
* This method expects to be overridden by subclasses
* @return Space property value
*/
public SpaceProperty getSpace() {
return null;
}
/**
* This method expects to be overridden by subclasses
* @return Keep property value
*/
public KeepProperty getKeep() {
return null;
}
/**
* This method expects to be overridden by subclasses
* @return integer equivalent of enumerated property value
*/
public int getEnum() {
return 0;
}
/**
* This method expects to be overridden by subclasses
* @return char property value
*/
public char getCharacter() {
return 0;
}
/**
* This method expects to be overridden by subclasses
* @return collection of other property (sub-property) objects
*/
public Vector getList() {
return null;
}
/**
* This method expects to be overridden by subclasses
* @return Number property value
*/
public Number getNumber() {
return null;
}
/**
* This method expects to be overridden by subclasses
* @return Numeric property value
*/
public Numeric getNumeric() {
return null;
}
/**
* This method expects to be overridden by subclasses
* @return NCname property value
*/
public String getNCname() {
return null;
}
/**
* This method expects to be overridden by subclasses
* @return Object property value
*/
public Object getObject() {
return null;
}
/**
* This method expects to be overridden by subclasses.
* @return String property value
*/
public String getString() {
return null;
}
/**
* Return a string representation of the property value. Only used
* for debugging.
*/
public String toString() {
Object obj = getObject();
if (obj != this) {
return obj.toString();
}
return null;
}
}
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