/**
* 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.compiler;
import org.mvel2.ParserConfiguration;
import org.mvel2.ast.ASTNode;
import org.mvel2.ast.TypeCast;
import org.mvel2.integration.VariableResolverFactory;
import org.mvel2.integration.impl.ClassImportResolverFactory;
import org.mvel2.integration.impl.StackResetResolverFactory;
import org.mvel2.optimizers.AccessorOptimizer;
import org.mvel2.optimizers.OptimizerFactory;
import org.mvel2.util.ASTLinkedList;
import java.io.Serializable;
import static org.mvel2.MVELRuntime.execute;
import static org.mvel2.optimizers.OptimizerFactory.setThreadAccessorOptimizer;
public class CompiledExpression implements Serializable, ExecutableStatement {
private ASTNode firstNode;
private Class knownEgressType;
private Class knownIngressType;
private boolean convertableIngressEgress;
private boolean optimized = false;
private boolean importInjectionRequired = false;
private boolean literalOnly;
private Class<? extends AccessorOptimizer> accessorOptimizer;
private String sourceName;
private ParserConfiguration parserConfiguration;
public CompiledExpression(ASTLinkedList astMap, String sourceName, Class egressType, ParserConfiguration parserConfiguration, boolean literalOnly) {
this.firstNode = astMap.firstNode();
this.sourceName = sourceName;
this.knownEgressType = astMap.isSingleNode() ? astMap.firstNonSymbol().getEgressType() : egressType;
this.literalOnly = literalOnly;
this.parserConfiguration = parserConfiguration;
this.importInjectionRequired = parserConfiguration.getImports() != null && !parserConfiguration.getImports().isEmpty();
}
public ASTNode getFirstNode() {
return firstNode;
}
public boolean isSingleNode() {
return firstNode != null && firstNode.nextASTNode == null;
}
public Class getKnownEgressType() {
return knownEgressType;
}
public void setKnownEgressType(Class knownEgressType) {
this.knownEgressType = knownEgressType;
}
public Class getKnownIngressType() {
return knownIngressType;
}
public void setKnownIngressType(Class knownIngressType) {
this.knownIngressType = knownIngressType;
}
public boolean isConvertableIngressEgress() {
return convertableIngressEgress;
}
public void computeTypeConversionRule() {
if (knownIngressType != null && knownEgressType != null) {
convertableIngressEgress = knownIngressType.isAssignableFrom(knownEgressType);
}
}
public Object getValue(Object ctx, Object elCtx, VariableResolverFactory variableFactory) {
if (!optimized) {
setupOptimizers();
try {
return getValue(ctx, variableFactory);
}
finally {
OptimizerFactory.clearThreadAccessorOptimizer();
}
}
return getValue(ctx, variableFactory);
}
public Object getValue(Object staticContext, VariableResolverFactory factory) {
if (!optimized) {
setupOptimizers();
try {
return getValue(staticContext, factory);
}
finally {
OptimizerFactory.clearThreadAccessorOptimizer();
}
}
return getDirectValue(staticContext, factory);
}
public Object getDirectValue(Object staticContext, VariableResolverFactory factory) {
return execute(false, this, staticContext,
importInjectionRequired ? new ClassImportResolverFactory(parserConfiguration, factory, true) : new StackResetResolverFactory(factory));
}
private void setupOptimizers() {
if (accessorOptimizer != null) setThreadAccessorOptimizer(accessorOptimizer);
optimized = true;
}
public boolean isOptimized() {
return optimized;
}
public Class<? extends AccessorOptimizer> getAccessorOptimizer() {
return accessorOptimizer;
}
public String getSourceName() {
return sourceName;
}
public boolean intOptimized() {
return false;
}
public ParserConfiguration getParserConfiguration() {
return parserConfiguration;
}
public boolean isImportInjectionRequired() {
return importInjectionRequired;
}
public Object setValue(Object ctx, Object elCtx, VariableResolverFactory variableFactory, Object value) {
return null;
}
public boolean isLiteralOnly() {
return literalOnly;
}
public boolean isEmptyStatement() {
return firstNode == null;
}
public boolean isExplicitCast() {
return firstNode != null && firstNode instanceof TypeCast;
}
public String toString() {
StringBuilder appender = new StringBuilder();
ASTNode node = firstNode;
while (node != null) {
appender.append(node.toString()).append(";\n");
node = node.nextASTNode;
}
return appender.toString();
}
}