com.aowagie.text.pdf.fonts.cmaps.CMap Maven / Gradle / Ivy
/**
* Copyright (c) 2005, www.fontbox.org
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. 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.
* 3. Neither the name of fontbox; 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 REGENTS 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.
*
* http://www.fontbox.org
*
*/
package com.aowagie.text.pdf.fonts.cmaps;
import java.io.IOException;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
/**
* This class represents a CMap file.
*
* @author Ben Litchfield ([email protected])
* @since 2.1.4
*/
public class CMap
{
private final List codeSpaceRanges = new ArrayList();
private final Map singleByteMappings = new LinkedHashMap();
private final Map doubleByteMappings = new LinkedHashMap();
/**
* Creates a new instance of CMap.
*/
public CMap()
{
//default constructor
}
/**
* This will perform a lookup into the map.
*
* @param code The code used to lookup.
* @param offset The offset into the byte array.
* @param length The length of the data we are getting.
*
* @return The string that matches the lookup.
*/
public String lookup( final byte[] code, final int offset, final int length )
{
String result = null;
Integer key = null;
if( length == 1 )
{
key = Integer.valueOf( (code[offset]+256)%256 );
result = (String)this.singleByteMappings.get( key );
}
else if( length == 2 )
{
int intKey = (code[offset]+256)%256;
intKey <<= 8;
intKey += (code[offset+1]+256)%256;
key = Integer.valueOf( intKey );
result = (String)this.doubleByteMappings.get( key );
}
return result;
}
/**
* This will add a mapping.
*
* @param src The src to the mapping.
* @param dest The dest to the mapping.
*
* @throws IOException if the src is invalid.
*/
void addMapping( final byte[] src, final String dest ) throws IOException
{
if( src.length == 1 )
{
this.singleByteMappings.put( Integer.valueOf( src[0] ), dest );
}
else if( src.length == 2 )
{
int intSrc = src[0]&0xFF;
intSrc <<= 8;
intSrc |= src[1]&0xFF;
this.doubleByteMappings.put( Integer.valueOf( intSrc ), dest );
}
else
{
throw new IOException( "Mapping code should be 1 or two bytes and not " + src.length );
}
}
/**
* This will add a codespace range.
*
* @param range A single codespace range.
*/
void addCodespaceRange( final CodespaceRange range )
{
this.codeSpaceRanges.add( range );
}
/**
* Getter for property codeSpaceRanges.
*
* @return Value of property codeSpaceRanges.
*/
public List getCodeSpaceRanges()
{
return this.codeSpaceRanges;
}
}