/*
* 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: FunctionTable.java,v 1.6 2004/02/17 04:32:48 minchau Exp $
*/
package com.sun.org.apache.xpath.internal.compiler;
import com.sun.org.apache.xpath.internal.Expression;
import com.sun.org.apache.xpath.internal.functions.Function;
/**
* The function table for XPath.
*/
public class FunctionTable
{
/** The 'current()' id. */
public static final int FUNC_CURRENT = 0;
/** The 'last()' id. */
public static final int FUNC_LAST = 1;
/** The 'position()' id. */
public static final int FUNC_POSITION = 2;
/** The 'count()' id. */
public static final int FUNC_COUNT = 3;
/** The 'id()' id. */
public static final int FUNC_ID = 4;
/** The 'key()' id (XSLT). */
public static final int FUNC_KEY = 5;
/** The 'local-name()' id. */
public static final int FUNC_LOCAL_PART = 7;
/** The 'namespace-uri()' id. */
public static final int FUNC_NAMESPACE = 8;
/** The 'name()' id. */
public static final int FUNC_QNAME = 9;
/** The 'generate-id()' id. */
public static final int FUNC_GENERATE_ID = 10;
/** The 'not()' id. */
public static final int FUNC_NOT = 11;
/** The 'true()' id. */
public static final int FUNC_TRUE = 12;
/** The 'false()' id. */
public static final int FUNC_FALSE = 13;
/** The 'boolean()' id. */
public static final int FUNC_BOOLEAN = 14;
/** The 'number()' id. */
public static final int FUNC_NUMBER = 15;
/** The 'floor()' id. */
public static final int FUNC_FLOOR = 16;
/** The 'ceiling()' id. */
public static final int FUNC_CEILING = 17;
/** The 'round()' id. */
public static final int FUNC_ROUND = 18;
/** The 'sum()' id. */
public static final int FUNC_SUM = 19;
/** The 'string()' id. */
public static final int FUNC_STRING = 20;
/** The 'starts-with()' id. */
public static final int FUNC_STARTS_WITH = 21;
/** The 'contains()' id. */
public static final int FUNC_CONTAINS = 22;
/** The 'substring-before()' id. */
public static final int FUNC_SUBSTRING_BEFORE = 23;
/** The 'substring-after()' id. */
public static final int FUNC_SUBSTRING_AFTER = 24;
/** The 'normalize-space()' id. */
public static final int FUNC_NORMALIZE_SPACE = 25;
/** The 'translate()' id. */
public static final int FUNC_TRANSLATE = 26;
/** The 'concat()' id. */
public static final int FUNC_CONCAT = 27;
/** The 'substring()' id. */
public static final int FUNC_SUBSTRING = 29;
/** The 'string-length()' id. */
public static final int FUNC_STRING_LENGTH = 30;
/** The 'system-property()' id. */
public static final int FUNC_SYSTEM_PROPERTY = 31;
/** The 'lang()' id. */
public static final int FUNC_LANG = 32;
/** The 'function-available()' id (XSLT). */
public static final int FUNC_EXT_FUNCTION_AVAILABLE = 33;
/** The 'element-available()' id (XSLT). */
public static final int FUNC_EXT_ELEM_AVAILABLE = 34;
/** The 'unparsed-entity-uri()' id (XSLT). */
public static final int FUNC_UNPARSED_ENTITY_URI = 36;
// Proprietary
/** The 'document-location()' id (Proprietary). */
public static final int FUNC_DOCLOCATION = 35;
/**
* The function table.
*/
private static FuncLoader m_functions[];
/**
* Number of built in functions. Be sure to update this as
* built-in functions are added.
*/
private static final int NUM_BUILT_IN_FUNCS = 37;
/**
* Number of built-in functions that may be added.
*/
private static final int NUM_ALLOWABLE_ADDINS = 30;
/**
* The index to the next free function index.
*/
static int m_funcNextFreeIndex = NUM_BUILT_IN_FUNCS;
static
{
m_functions = new FuncLoader[NUM_BUILT_IN_FUNCS + NUM_ALLOWABLE_ADDINS];
m_functions[FUNC_CURRENT] = new FuncLoader("FuncCurrent", FUNC_CURRENT);
m_functions[FUNC_LAST] = new FuncLoader("FuncLast", FUNC_LAST);
m_functions[FUNC_POSITION] = new FuncLoader("FuncPosition",
FUNC_POSITION);
m_functions[FUNC_COUNT] = new FuncLoader("FuncCount", FUNC_COUNT);
m_functions[FUNC_ID] = new FuncLoader("FuncId", FUNC_ID);
m_functions[FUNC_KEY] =
new FuncLoader("com.sun.org.apache.xalan.internal.templates.FuncKey", FUNC_KEY);
// m_functions[FUNC_DOC] = new FuncDoc();
m_functions[FUNC_LOCAL_PART] = new FuncLoader("FuncLocalPart",
FUNC_LOCAL_PART);
m_functions[FUNC_NAMESPACE] = new FuncLoader("FuncNamespace",
FUNC_NAMESPACE);
m_functions[FUNC_QNAME] = new FuncLoader("FuncQname", FUNC_QNAME);
m_functions[FUNC_GENERATE_ID] = new FuncLoader("FuncGenerateId",
FUNC_GENERATE_ID);
m_functions[FUNC_NOT] = new FuncLoader("FuncNot", FUNC_NOT);
m_functions[FUNC_TRUE] = new FuncLoader("FuncTrue", FUNC_TRUE);
m_functions[FUNC_FALSE] = new FuncLoader("FuncFalse", FUNC_FALSE);
m_functions[FUNC_BOOLEAN] = new FuncLoader("FuncBoolean", FUNC_BOOLEAN);
m_functions[FUNC_LANG] = new FuncLoader("FuncLang", FUNC_LANG);
m_functions[FUNC_NUMBER] = new FuncLoader("FuncNumber", FUNC_NUMBER);
m_functions[FUNC_FLOOR] = new FuncLoader("FuncFloor", FUNC_FLOOR);
m_functions[FUNC_CEILING] = new FuncLoader("FuncCeiling", FUNC_CEILING);
m_functions[FUNC_ROUND] = new FuncLoader("FuncRound", FUNC_ROUND);
m_functions[FUNC_SUM] = new FuncLoader("FuncSum", FUNC_SUM);
m_functions[FUNC_STRING] = new FuncLoader("FuncString", FUNC_STRING);
m_functions[FUNC_STARTS_WITH] = new FuncLoader("FuncStartsWith",
FUNC_STARTS_WITH);
m_functions[FUNC_CONTAINS] = new FuncLoader("FuncContains",
FUNC_CONTAINS);
m_functions[FUNC_SUBSTRING_BEFORE] = new FuncLoader("FuncSubstringBefore",
FUNC_SUBSTRING_BEFORE);
m_functions[FUNC_SUBSTRING_AFTER] = new FuncLoader("FuncSubstringAfter",
FUNC_SUBSTRING_AFTER);
m_functions[FUNC_NORMALIZE_SPACE] = new FuncLoader("FuncNormalizeSpace",
FUNC_NORMALIZE_SPACE);
m_functions[FUNC_TRANSLATE] = new FuncLoader("FuncTranslate",
FUNC_TRANSLATE);
m_functions[FUNC_CONCAT] = new FuncLoader("FuncConcat", FUNC_CONCAT);
//m_functions[FUNC_FORMAT_NUMBER] = new FuncFormatNumber();
m_functions[FUNC_SYSTEM_PROPERTY] = new FuncLoader("FuncSystemProperty",
FUNC_SYSTEM_PROPERTY);
m_functions[FUNC_EXT_FUNCTION_AVAILABLE] =
new FuncLoader("FuncExtFunctionAvailable", FUNC_EXT_FUNCTION_AVAILABLE);
m_functions[FUNC_EXT_ELEM_AVAILABLE] =
new FuncLoader("FuncExtElementAvailable", FUNC_EXT_ELEM_AVAILABLE);
m_functions[FUNC_SUBSTRING] = new FuncLoader("FuncSubstring",
FUNC_SUBSTRING);
m_functions[FUNC_STRING_LENGTH] = new FuncLoader("FuncStringLength",
FUNC_STRING_LENGTH);
m_functions[FUNC_DOCLOCATION] = new FuncLoader("FuncDoclocation",
FUNC_DOCLOCATION);
m_functions[FUNC_UNPARSED_ENTITY_URI] =
new FuncLoader("FuncUnparsedEntityURI", FUNC_UNPARSED_ENTITY_URI);
}
/**
* Return the name of the a function in the static table. Needed to avoid
* making the table publicly available.
*/
static String getFunctionName(int funcID) {
return m_functions[funcID].getName();
}
/**
* Obtain a new Function object from a function ID.
*
* @param which The function ID, which may correspond to one of the FUNC_XXX
* values found in {@link com.sun.org.apache.xpath.internal.compiler.FunctionTable}, but may
* be a value installed by an external module.
*
* @return a a new Function instance.
*
* @throws javax.xml.transform.TransformerException if ClassNotFoundException,
* IllegalAccessException, or InstantiationException is thrown.
*/
public static Function getFunction(int which)
throws javax.xml.transform.TransformerException
{
return m_functions[which].getFunction();
}
/**
* Install a built-in function.
* @param name The unqualified name of the function.
* @param func A Implementation of an XPath Function object.
* @return the position of the function in the internal index.
*/
public static int installFunction(String name, Expression func)
{
int funcIndex;
Object funcIndexObj = Keywords.m_functions.get(name);
if (null != funcIndexObj)
{
funcIndex = ((Integer) funcIndexObj).intValue();
}
else
{
funcIndex = m_funcNextFreeIndex;
m_funcNextFreeIndex++;
Keywords.m_functions.put(name, new Integer(funcIndex));
}
FuncLoader loader = new FuncLoader(func.getClass().getName(), funcIndex);
m_functions[funcIndex] = loader;
return funcIndex;
}
/**
* Install a function loader at a specific index.
* @param func A Implementation of an XPath Function object.
* @param which The function ID, which may correspond to one of the FUNC_XXX
* values found in {@link com.sun.org.apache.xpath.internal.compiler.FunctionTable}, but may
* be a value installed by an external module.
* @return the position of the function in the internal index.
*/
public static void installFunction(Expression func, int funcIndex)
{
FuncLoader loader = new FuncLoader(func.getClass().getName(), funcIndex);
m_functions[funcIndex] = loader;
}
}
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