/**
* MVEL 2.0
* Copyright (C) 2007 The Codehaus
* Mike Brock, Dhanji Prasanna, John Graham, Mark Proctor
*
* 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 org.mvel2.ast;
import org.mvel2.CompileException;
import org.mvel2.MVEL;
import org.mvel2.ParserContext;
import org.mvel2.integration.VariableResolverFactory;
import org.mvel2.integration.impl.ImmutableDefaultFactory;
import org.mvel2.integration.impl.StackResetResolverFactory;
import org.mvel2.util.ParseTools;
import static org.mvel2.util.ParseTools.findClassImportResolverFactory;
/**
* @author Christopher Brock
*/
public class ImportNode extends ASTNode {
private Class importClass;
private boolean packageImport;
private int _offset;
ParserContext pCtx;
private static final char[] WC_TEST = new char[]{'.', '*'};
public ImportNode(char[] expr, int start, int offset, ParserContext pCtx) {
super(pCtx);
this.expr = expr;
this.start = start;
this.offset = offset;
this.pCtx = pCtx;
if (ParseTools.endsWith(expr, start, offset, WC_TEST)) {
packageImport = true;
_offset = (short) ParseTools.findLast(expr, start, offset, '.');
if (_offset == -1) {
_offset = 0;
}
}
else {
String clsName = new String(expr, start, offset);
ClassLoader classLoader = getClassLoader();
try {
this.importClass = Class.forName(clsName, true, classLoader );
}
catch (ClassNotFoundException e) {
int idx;
clsName = (clsName.substring(0, idx = clsName.lastIndexOf('.')) + "$" + clsName.substring(idx + 1)).trim();
try {
this.importClass = Class.forName(clsName, true, classLoader );
}
catch (ClassNotFoundException e2) {
throw new CompileException("class not found: " + new String(expr), expr, start);
}
}
}
}
public Object getReducedValueAccelerated(Object ctx, Object thisValue, VariableResolverFactory factory) {
if (!packageImport) {
if (MVEL.COMPILER_OPT_ALLOCATE_TYPE_LITERALS_TO_SHARED_SYMBOL_TABLE) {
factory.createVariable(importClass.getSimpleName(), importClass);
return importClass;
}
return findClassImportResolverFactory(factory, pCtx).addClass(importClass);
}
// if the factory is an ImmutableDefaultFactory it means this import is unused so we can skip it safely
if (!(factory instanceof ImmutableDefaultFactory)
&& !(factory instanceof StackResetResolverFactory
&& ((StackResetResolverFactory) factory).getDelegate() instanceof ImmutableDefaultFactory)) {
findClassImportResolverFactory(factory, pCtx).addPackageImport(new String(expr, start, _offset - start));
}
return null;
}
public Object getReducedValue(Object ctx, Object thisValue, VariableResolverFactory factory) {
return getReducedValueAccelerated(ctx, thisValue, factory);
}
public Class getImportClass() {
return importClass;
}
public boolean isPackageImport() {
return packageImport;
}
public void setPackageImport(boolean packageImport) {
this.packageImport = packageImport;
}
public String getPackageImport() {
return new String(expr, start, _offset - start);
}
}