/*
* Copyright (c) 2003 The Visigoth Software Society. 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. The end-user documentation included with the redistribution, if
* any, must include the following acknowledgement:
* "This product includes software developed by the
* Visigoth Software Society (http://www.visigoths.org/)."
* Alternately, this acknowledgement may appear in the software itself,
* if and wherever such third-party acknowledgements normally appear.
*
* 4. Neither the name "FreeMarker", "Visigoth", nor any of the names of the
* project contributors may be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact [email protected].
*
* 5. Products derived from this software may not be called "FreeMarker" or "Visigoth"
* nor may "FreeMarker" or "Visigoth" appear in their names
* without prior written permission of the Visigoth Software Society.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 VISIGOTH SOFTWARE SOCIETY OR
* ITS 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Visigoth Software Society. For more
* information on the Visigoth Software Society, please see
* http://www.visigoths.org/
*/
package freemarker.core;
import freemarker.template.*;
import java.util.*;
final class HashLiteral extends Expression {
private final ArrayList keys, values;
private final int size;
HashLiteral(ArrayList keys, ArrayList values) {
this.keys = keys;
this.values = values;
this.size = keys.size();
keys.trimToSize();
values.trimToSize();
}
TemplateModel _getAsTemplateModel(Environment env) throws TemplateException {
return new SequenceHash(env);
}
public String getCanonicalForm() {
StringBuffer buf = new StringBuffer("{");
for (int i = 0; i < size; i++) {
Expression key = (Expression) keys.get(i);
Expression value = (Expression) values.get(i);
buf.append(key.getCanonicalForm());
buf.append(" : ");
buf.append(value.getCanonicalForm());
if (i != size-1) {
buf.append(",");
}
}
buf.append("}");
return buf.toString();
}
boolean isLiteral() {
if (constantValue != null) {
return true;
}
for (int i = 0; i < size; i++) {
Expression key = (Expression) keys.get(i);
Expression value = (Expression) values.get(i);
if (!key.isLiteral() || !value.isLiteral()) {
return false;
}
}
return true;
}
Expression _deepClone(String name, Expression subst) {
ArrayList clonedKeys = (ArrayList)keys.clone();
for (ListIterator iter = clonedKeys.listIterator(); iter.hasNext();) {
iter.set(((Expression)iter.next()).deepClone(name, subst));
}
ArrayList clonedValues = (ArrayList)values.clone();
for (ListIterator iter = clonedValues.listIterator(); iter.hasNext();) {
iter.set(((Expression)iter.next()).deepClone(name, subst));
}
return new HashLiteral(clonedKeys, clonedValues);
}
private class SequenceHash implements TemplateHashModelEx {
private HashMap keyMap; // maps keys to integer offset
private TemplateCollectionModel keyCollection, valueCollection; // ordered lists of keys and values
SequenceHash(Environment env) throws TemplateException {
keyMap = new HashMap();
ArrayList keyList = new ArrayList(size);
ArrayList valueList = new ArrayList(size);
for (int i = 0; i< size; i++) {
Expression keyExp = (Expression) keys.get(i);
Expression valExp = (Expression) values.get(i);
String key = keyExp.getStringValue(env);
TemplateModel value = valExp.getAsTemplateModel(env);
assertNonNull(value, valExp, env);
keyMap.put(key, value);
keyList.add(key);
valueList.add(value);
}
keyCollection = new CollectionAndSequence(new SimpleSequence(keyList));
valueCollection = new CollectionAndSequence(new SimpleSequence(valueList));
}
public int size() {
return size;
}
public TemplateCollectionModel keys() {
return keyCollection;
}
public TemplateCollectionModel values() {
return valueCollection;
}
public TemplateModel get(String key) {
return (TemplateModel) keyMap.get(key);
}
public boolean isEmpty() {
return size == 0;
}
}
}
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