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/*
* Copyright 2001, 2002,2004 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.
*/
package com.sun.org.apache.xerces.internal.impl.xs;
import com.sun.org.apache.xerces.internal.impl.dv.xs.XSSimpleTypeDecl;
/**
* This class is pool that enables caching of XML Schema declaration objects.
* Before a compiled grammar object is garbage collected,
* the implementation will add all XML Schema component
* declarations to the pool.
* Note: The cashing mechanism is not implemented yet.
*
* @xerces.internal
*
* @author Elena Litani, IBM
* @version $Id: XSDeclarationPool.java,v 1.2.6.1 2005/09/09 07:30:55 sunithareddy Exp $
*/
public final class XSDeclarationPool {
/** Chunk shift (8). */
private static final int CHUNK_SHIFT = 8; // 2^8 = 256
/** Chunk size (1 << CHUNK_SHIFT). */
private static final int CHUNK_SIZE = 1 << CHUNK_SHIFT;
/** Chunk mask (CHUNK_SIZE - 1). */
private static final int CHUNK_MASK = CHUNK_SIZE - 1;
/** Initial chunk count (). */
private static final int INITIAL_CHUNK_COUNT = (1 << (10 - CHUNK_SHIFT)); // 2^10 = 1k
/** Element declaration pool*/
private XSElementDecl fElementDecl[][] = new XSElementDecl[INITIAL_CHUNK_COUNT][];
private int fElementDeclIndex = 0;
/** Particle declaration pool */
private XSParticleDecl fParticleDecl[][] = new XSParticleDecl[INITIAL_CHUNK_COUNT][];
private int fParticleDeclIndex = 0;
/** Particle declaration pool */
private XSModelGroupImpl fModelGroup[][] = new XSModelGroupImpl[INITIAL_CHUNK_COUNT][];
private int fModelGroupIndex = 0;
/** Attribute declaration pool */
private XSAttributeDecl fAttrDecl[][] = new XSAttributeDecl[INITIAL_CHUNK_COUNT][];
private int fAttrDeclIndex = 0;
/** ComplexType declaration pool */
private XSComplexTypeDecl fCTDecl[][] = new XSComplexTypeDecl[INITIAL_CHUNK_COUNT][];
private int fCTDeclIndex = 0;
/** SimpleType declaration pool */
private XSSimpleTypeDecl fSTDecl[][] = new XSSimpleTypeDecl[INITIAL_CHUNK_COUNT][];
private int fSTDeclIndex = 0;
/** AttributeUse declaration pool */
private XSAttributeUseImpl fAttributeUse[][] = new XSAttributeUseImpl[INITIAL_CHUNK_COUNT][];
private int fAttributeUseIndex = 0;
public final XSElementDecl getElementDecl(){
int chunk = fElementDeclIndex >> CHUNK_SHIFT;
int index = fElementDeclIndex & CHUNK_MASK;
ensureElementDeclCapacity(chunk);
if (fElementDecl[chunk][index] == null) {
fElementDecl[chunk][index] = new XSElementDecl();
} else {
fElementDecl[chunk][index].reset();
}
fElementDeclIndex++;
return fElementDecl[chunk][index];
}
public final XSAttributeDecl getAttributeDecl(){
int chunk = fAttrDeclIndex >> CHUNK_SHIFT;
int index = fAttrDeclIndex & CHUNK_MASK;
ensureAttrDeclCapacity(chunk);
if (fAttrDecl[chunk][index] == null) {
fAttrDecl[chunk][index] = new XSAttributeDecl();
} else {
fAttrDecl[chunk][index].reset();
}
fAttrDeclIndex++;
return fAttrDecl[chunk][index];
}
public final XSAttributeUseImpl getAttributeUse(){
int chunk = fAttributeUseIndex >> CHUNK_SHIFT;
int index = fAttributeUseIndex & CHUNK_MASK;
ensureAttributeUseCapacity(chunk);
if (fAttributeUse[chunk][index] == null) {
fAttributeUse[chunk][index] = new XSAttributeUseImpl();
} else {
fAttributeUse[chunk][index].reset();
}
fAttributeUseIndex++;
return fAttributeUse[chunk][index];
}
public final XSComplexTypeDecl getComplexTypeDecl(){
int chunk = fCTDeclIndex >> CHUNK_SHIFT;
int index = fCTDeclIndex & CHUNK_MASK;
ensureCTDeclCapacity(chunk);
if (fCTDecl[chunk][index] == null) {
fCTDecl[chunk][index] = new XSComplexTypeDecl();
} else {
fCTDecl[chunk][index].reset();
}
fCTDeclIndex++;
return fCTDecl[chunk][index];
}
public final XSSimpleTypeDecl getSimpleTypeDecl(){
int chunk = fSTDeclIndex >> CHUNK_SHIFT;
int index = fSTDeclIndex & CHUNK_MASK;
ensureSTDeclCapacity(chunk);
if (fSTDecl[chunk][index] == null) {
fSTDecl[chunk][index] = new XSSimpleTypeDecl();
} else {
fSTDecl[chunk][index].reset();
}
fSTDeclIndex++;
return fSTDecl[chunk][index];
}
public final XSParticleDecl getParticleDecl(){
int chunk = fParticleDeclIndex >> CHUNK_SHIFT;
int index = fParticleDeclIndex & CHUNK_MASK;
ensureParticleDeclCapacity(chunk);
if (fParticleDecl[chunk][index] == null) {
fParticleDecl[chunk][index] = new XSParticleDecl();
} else {
fParticleDecl[chunk][index].reset();
}
fParticleDeclIndex++;
return fParticleDecl[chunk][index];
}
public final XSModelGroupImpl getModelGroup(){
int chunk = fModelGroupIndex >> CHUNK_SHIFT;
int index = fModelGroupIndex & CHUNK_MASK;
ensureModelGroupCapacity(chunk);
if (fModelGroup[chunk][index] == null) {
fModelGroup[chunk][index] = new XSModelGroupImpl();
} else {
fModelGroup[chunk][index].reset();
}
fModelGroupIndex++;
return fModelGroup[chunk][index];
}
// REVISIT: do we need decl pool for group declarations, attribute group,
// notations?
// it seems like each schema would use a small number of those
// components, so it probably is not worth keeping those components
// in the pool.
private boolean ensureElementDeclCapacity(int chunk) {
if (chunk >= fElementDecl.length) {
fElementDecl = resize(fElementDecl, fElementDecl.length * 2);
} else if (fElementDecl[chunk] != null) {
return false;
}
fElementDecl[chunk] = new XSElementDecl[CHUNK_SIZE];
return true;
}
private static XSElementDecl[][] resize(XSElementDecl array[][], int newsize) {
XSElementDecl newarray[][] = new XSElementDecl[newsize][];
System.arraycopy(array, 0, newarray, 0, array.length);
return newarray;
}
private boolean ensureParticleDeclCapacity(int chunk) {
if (chunk >= fParticleDecl.length) {
fParticleDecl = resize(fParticleDecl, fParticleDecl.length * 2);
} else if (fParticleDecl[chunk] != null) {
return false;
}
fParticleDecl[chunk] = new XSParticleDecl[CHUNK_SIZE];
return true;
}
private boolean ensureModelGroupCapacity(int chunk) {
if (chunk >= fModelGroup.length) {
fModelGroup = resize(fModelGroup, fModelGroup.length * 2);
} else if (fModelGroup[chunk] != null) {
return false;
}
fModelGroup[chunk] = new XSModelGroupImpl[CHUNK_SIZE];
return true;
}
private static XSParticleDecl[][] resize(XSParticleDecl array[][], int newsize) {
XSParticleDecl newarray[][] = new XSParticleDecl[newsize][];
System.arraycopy(array, 0, newarray, 0, array.length);
return newarray;
}
private static XSModelGroupImpl[][] resize(XSModelGroupImpl array[][], int newsize) {
XSModelGroupImpl newarray[][] = new XSModelGroupImpl[newsize][];
System.arraycopy(array, 0, newarray, 0, array.length);
return newarray;
}
private boolean ensureAttrDeclCapacity(int chunk) {
if (chunk >= fAttrDecl.length) {
fAttrDecl = resize(fAttrDecl, fAttrDecl.length * 2);
} else if (fAttrDecl[chunk] != null) {
return false;
}
fAttrDecl[chunk] = new XSAttributeDecl[CHUNK_SIZE];
return true;
}
private static XSAttributeDecl[][] resize(XSAttributeDecl array[][], int newsize) {
XSAttributeDecl newarray[][] = new XSAttributeDecl[newsize][];
System.arraycopy(array, 0, newarray, 0, array.length);
return newarray;
}
private boolean ensureAttributeUseCapacity(int chunk) {
if (chunk >= fAttributeUse.length) {
fAttributeUse = resize(fAttributeUse, fAttributeUse.length * 2);
} else if (fAttributeUse[chunk] != null) {
return false;
}
fAttributeUse[chunk] = new XSAttributeUseImpl[CHUNK_SIZE];
return true;
}
private static XSAttributeUseImpl[][] resize(XSAttributeUseImpl array[][], int newsize) {
XSAttributeUseImpl newarray[][] = new XSAttributeUseImpl[newsize][];
System.arraycopy(array, 0, newarray, 0, array.length);
return newarray;
}
private boolean ensureSTDeclCapacity(int chunk) {
if (chunk >= fSTDecl.length) {
fSTDecl = resize(fSTDecl, fSTDecl.length * 2);
} else if (fSTDecl[chunk] != null) {
return false;
}
fSTDecl[chunk] = new XSSimpleTypeDecl[CHUNK_SIZE];
return true;
}
private static XSSimpleTypeDecl[][] resize(XSSimpleTypeDecl array[][], int newsize) {
XSSimpleTypeDecl newarray[][] = new XSSimpleTypeDecl[newsize][];
System.arraycopy(array, 0, newarray, 0, array.length);
return newarray;
}
private boolean ensureCTDeclCapacity(int chunk) {
if (chunk >= fCTDecl.length) {
fCTDecl = resize(fCTDecl, fCTDecl.length * 2);
} else if (fCTDecl[chunk] != null){
return false;
}
fCTDecl[chunk] = new XSComplexTypeDecl[CHUNK_SIZE];
return true;
}
private static XSComplexTypeDecl[][] resize(XSComplexTypeDecl array[][], int newsize) {
XSComplexTypeDecl newarray[][] = new XSComplexTypeDecl[newsize][];
System.arraycopy(array, 0, newarray, 0, array.length);
return newarray;
}
public void reset(){
fElementDeclIndex = 0;
fParticleDeclIndex = 0;
fModelGroupIndex = 0;
fSTDeclIndex = 0;
fCTDeclIndex = 0;
fAttrDeclIndex = 0;
fAttributeUseIndex = 0;
}
}