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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.fop.datatypes.Numeric;
import org.apache.fop.datatypes.PercentBaseContext;
import org.apache.fop.fo.expr.PropertyException;
/**
* A number quantity in XSL which is specified as an enum, such as "no-limit".
*/
public final class EnumNumber extends Property implements Numeric {
/** cache holding all canonical EnumNumber instances */
private static final PropertyCache cache = new PropertyCache(EnumNumber.class);
private final EnumProperty enumProperty;
/**
* Constructor
* @param enumProperty the base EnumProperty
*/
private EnumNumber(Property enumProperty) {
this.enumProperty = (EnumProperty) enumProperty;
}
/**
* Returns the canonical EnumNumber instance corresponding
* to the given Property
*
* @param enumProperty the base EnumProperty
* @return the canonical instance
*/
public static EnumNumber getInstance(Property enumProperty) {
return (EnumNumber)cache.fetch(
new EnumNumber((EnumProperty) enumProperty));
}
/** {@inheritDoc} */
public int getEnum() {
return enumProperty.getEnum();
}
/** {@inheritDoc} */
public String getString() {
return enumProperty.toString();
}
/** {@inheritDoc} */
public Object getObject() {
return enumProperty.getObject();
}
/** {@inheritDoc} */
public boolean equals(Object obj) {
if (obj instanceof EnumNumber) {
return (((EnumNumber)obj).enumProperty == this.enumProperty);
} else {
return false;
}
}
/** {@inheritDoc} */
public int hashCode() {
return enumProperty.hashCode();
}
/** {@inheritDoc} */
public int getDimension() {
return 0;
}
/**
* {@inheritDoc}
* Always <code>true</code> for instances of this type
*/
public boolean isAbsolute() {
return true;
}
/**
* {@inheritDoc}
* logs an error, because it's not supposed to be called
*/
public double getNumericValue(PercentBaseContext context) throws PropertyException {
log.error("getNumericValue() called on " + enumProperty + " number");
return 0;
}
/**
* {@inheritDoc}
* logs an error, because it's not supposed to be called
*/
public int getValue(PercentBaseContext context) {
log.error("getValue() called on " + enumProperty + " number");
return 0;
}
/**
* {@inheritDoc}
* logs an error, because it's not supposed to be called
*/
public int getValue() {
log.error("getValue() called on " + enumProperty + " number");
return 0;
}
/**
* {@inheritDoc}
* logs an error, because it's not supposed to be called
*/
public double getNumericValue() {
log.error("getNumericValue() called on " + enumProperty + " number");
return 0;
}
/**
* {@inheritDoc}
*/
public Numeric getNumeric() {
return this;
}
}
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