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//--------------------------------------------------------------------------
// Copyright (c) 1998-2004, Drew Davidson and Luke Blanshard
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// 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.
// Neither the name of the Drew Davidson 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
// COPYRIGHT OWNER 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.
//--------------------------------------------------------------------------
package org.apache.ibatis.ognl;
import java.lang.reflect.Array;
/**
* @author Luke Blanshard ([email protected])
* @author Drew Davidson ([email protected])
*/
class ASTChain extends SimpleNode {
public ASTChain(int id) {
super(id);
}
public ASTChain(OgnlParser p, int id) {
super(p, id);
}
public void jjtClose() {
flattenTree();
}
protected Object getValueBody(OgnlContext context, Object source) throws OgnlException {
Object result = source;
for (int i = 0, ilast = children.length - 1; i <= ilast; ++i) {
boolean handled = false;
if (i < ilast) {
if (children[i] instanceof ASTProperty) {
ASTProperty propertyNode = (ASTProperty) children[i];
int indexType = propertyNode.getIndexedPropertyType(context, result);
if ((indexType != OgnlRuntime.INDEXED_PROPERTY_NONE) && (children[i + 1] instanceof ASTProperty)) {
ASTProperty indexNode = (ASTProperty) children[i + 1];
if (indexNode.isIndexedAccess()) {
Object index = indexNode.getProperty(context, result);
if (index instanceof DynamicSubscript) {
if (indexType == OgnlRuntime.INDEXED_PROPERTY_INT) {
Object array = propertyNode.getValue(context, result);
int len = Array.getLength(array);
switch (((DynamicSubscript) index).getFlag()) {
case DynamicSubscript.ALL:
result = Array.newInstance(array.getClass().getComponentType(), len);
System.arraycopy(array, 0, result, 0, len);
handled = true;
i++;
break;
case DynamicSubscript.FIRST:
index = new Integer((len > 0) ? 0 : -1);
break;
case DynamicSubscript.MID:
index = new Integer((len > 0) ? (len / 2) : -1);
break;
case DynamicSubscript.LAST:
index = new Integer((len > 0) ? (len - 1) : -1);
break;
}
} else {
if (indexType == OgnlRuntime.INDEXED_PROPERTY_OBJECT) {
throw new OgnlException("DynamicSubscript '" + indexNode + "' not allowed for object indexed property '" + propertyNode + "'");
}
}
}
if (!handled) {
result = OgnlRuntime.getIndexedProperty(context, result, propertyNode.getProperty(context, result).toString(), index);
handled = true;
i++;
}
}
}
}
}
if (!handled) {
result = children[i].getValue(context, result);
}
}
return result;
}
protected void setValueBody(OgnlContext context, Object target, Object value) throws OgnlException {
boolean handled = false;
for (int i = 0, ilast = children.length - 2; i <= ilast; ++i) {
if (i == ilast) {
if (children[i] instanceof ASTProperty) {
ASTProperty propertyNode = (ASTProperty) children[i];
int indexType = propertyNode.getIndexedPropertyType(context, target);
if ((indexType != OgnlRuntime.INDEXED_PROPERTY_NONE) && (children[i + 1] instanceof ASTProperty)) {
ASTProperty indexNode = (ASTProperty) children[i + 1];
if (indexNode.isIndexedAccess()) {
Object index = indexNode.getProperty(context, target);
if (index instanceof DynamicSubscript) {
if (indexType == OgnlRuntime.INDEXED_PROPERTY_INT) {
Object array = propertyNode.getValue(context, target);
int len = Array.getLength(array);
switch (((DynamicSubscript) index).getFlag()) {
case DynamicSubscript.ALL:
System.arraycopy(target, 0, value, 0, len);
handled = true;
i++;
break;
case DynamicSubscript.FIRST:
index = new Integer((len > 0) ? 0 : -1);
break;
case DynamicSubscript.MID:
index = new Integer((len > 0) ? (len / 2) : -1);
break;
case DynamicSubscript.LAST:
index = new Integer((len > 0) ? (len - 1) : -1);
break;
}
} else {
if (indexType == OgnlRuntime.INDEXED_PROPERTY_OBJECT) {
throw new OgnlException("DynamicSubscript '" + indexNode + "' not allowed for object indexed property '" + propertyNode + "'");
}
}
}
if (!handled) {
OgnlRuntime.setIndexedProperty(context, target, propertyNode.getProperty(context, target).toString(), index, value);
handled = true;
i++;
}
}
}
}
}
if (!handled) {
target = children[i].getValue(context, target);
}
}
if (!handled) {
children[children.length - 1].setValue(context, target, value);
}
}
public boolean isSimpleNavigationChain(OgnlContext context) throws OgnlException {
boolean result = false;
if ((children != null) && (children.length > 0)) {
result = true;
for (int i = 0; result && (i < children.length); i++) {
if (children[i] instanceof SimpleNode) {
result = ((SimpleNode) children[i]).isSimpleProperty(context);
} else {
result = false;
}
}
}
return result;
}
public String toString() {
String result = "";
if ((children != null) && (children.length > 0)) {
for (int i = 0; i < children.length; i++) {
if (i > 0) {
if (!(children[i] instanceof ASTProperty) || !((ASTProperty) children[i]).isIndexedAccess()) {
result = result + ".";
}
}
result += children[i].toString();
}
}
return result;
}
}
