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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.expr;
import org.apache.fop.datatypes.Length;
import org.apache.fop.datatypes.PercentBaseContext;
import org.apache.fop.datatypes.Numeric;
import org.apache.fop.fo.properties.ColorTypeProperty;
import org.apache.fop.fo.properties.Property;
/**
* A numeric property which hold the final absolute result of an expression
* calculations.
*/
public class NumericProperty extends Property implements Numeric, Length {
private double value;
private int dim;
/**
* Construct a Numeric object by specifying one or more components,
* including absolute length, percent length, table units.
* @param value The value of the numeric.
* @param dim The dimension of the value. 0 for a Number, 1 for a Length
* (any type), >1, <0 if Lengths have been multiplied or divided.
*/
protected NumericProperty(double value, int dim) {
this.value = value;
this.dim = dim;
}
/**
* Return the dimension.
* @see Numeric#getDimension()
*/
public int getDimension() {
return dim;
}
/**
* Return the value.
* @see Numeric#getNumericValue()
*/
public double getNumericValue() {
return value;
}
/**
* @see Numeric#getNumericValue(PercentBaseContext)
*/
public double getNumericValue(PercentBaseContext context) {
return value;
}
/**
* Return true of the numeric is absolute.
* @see Numeric#isAbsolute()
*/
public boolean isAbsolute() {
return true;
}
/**
* Cast this as a Numeric.
*/
public Numeric getNumeric() {
return this;
}
/**
* Cast this as a number.
*/
public Number getNumber() {
return new Double(value);
}
/**
* @see org.apache.fop.datatypes.Numeric#getValue()
*/
public int getValue() {
return (int) value;
}
/**
* @see org.apache.fop.datatypes.Numeric#getValue(PercentBaseContext)
*/
public int getValue(PercentBaseContext context) {
return (int) value;
}
/**
* Cast this as a length. That is only possible when the dimension is
* one.
*/
public Length getLength() {
if (dim == 1) {
return this;
}
log.error("Can't create length with dimension " + dim);
return null;
}
/**
* Cast this as a ColorTypeProperty.
*/
public ColorTypeProperty getColorType() {
// try converting to numeric number and then to color
return null;
}
/**
* Cast this as an Object.
*/
public Object getObject() {
return this;
}
/**
* Return a string representation of this Numeric. It is only useable for
* debugging.
*/
public String toString() {
if (dim == 1) {
return (int) value + "mpt";
} else {
return value + "^" + dim;
}
}
}
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