| package org.apache.commons.ognl; |
| |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| */ |
| |
| import org.apache.commons.ognl.enhance.ExpressionCompiler; |
| import org.apache.commons.ognl.enhance.UnsupportedCompilationException; |
| |
| import static java.lang.String.format; |
| |
| /** |
| * $Id$ |
| */ |
| public class ASTAnd |
| extends BooleanExpression |
| { |
| /** Serial */ |
| private static final long serialVersionUID = -4585941425250141812L; |
| |
| /** |
| * TODO: javadoc |
| * @param id the id |
| */ |
| public ASTAnd( int id ) |
| { |
| super( id ); |
| } |
| |
| /** |
| * TODO: javadoc |
| * @param p the parser |
| * @param id the id |
| */ |
| public ASTAnd( OgnlParser p, int id ) |
| { |
| super( p, id ); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.apache.commons.ognl.SimpleNode#jjtClose() |
| */ |
| public void jjtClose() |
| { |
| flattenTree(); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.apache.commons.ognl.SimpleNode#getValueBody(org.apache.commons.ognl.OgnlContext, java.lang.Object) |
| */ |
| protected Object getValueBody( OgnlContext context, Object source ) |
| throws OgnlException |
| { |
| Object result = null; |
| int last = children.length - 1; |
| for ( int i = 0; i <= last; ++i ) |
| { |
| result = children[i].getValue( context, source ); |
| |
| if ( i != last && !OgnlOps.booleanValue( result ) ) |
| { |
| break; |
| } |
| } |
| |
| return result; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.apache.commons.ognl.SimpleNode#setValueBody(org.apache.commons.ognl.OgnlContext, java.lang.Object, java.lang.Object) |
| */ |
| protected void setValueBody( OgnlContext context, Object target, Object value ) |
| throws OgnlException |
| { |
| int last = children.length - 1; |
| |
| for ( int i = 0; i < last; ++i ) |
| { |
| Object v = children[i].getValue( context, target ); |
| |
| if ( !OgnlOps.booleanValue( v ) ) |
| { |
| return; |
| } |
| } |
| |
| children[last].setValue( context, target, value ); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.apache.commons.ognl.ExpressionNode#getExpressionOperator(int) |
| */ |
| public String getExpressionOperator( int index ) |
| { |
| return "&&"; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.apache.commons.ognl.BooleanExpression#getGetterClass() |
| */ |
| public Class getGetterClass() |
| { |
| return null; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.apache.commons.ognl.BooleanExpression#toGetSourceString(org.apache.commons.ognl.OgnlContext, java.lang.Object) |
| */ |
| public String toGetSourceString( OgnlContext context, Object target ) |
| { |
| if ( children.length != 2 ) |
| { |
| throw new UnsupportedCompilationException( |
| "Can only compile boolean expressions with two children." ); |
| } |
| |
| String result = ""; |
| |
| try |
| { |
| |
| String first = OgnlRuntime.getChildSource( context, target, children[0] ); |
| if ( !OgnlOps.booleanValue( context.getCurrentObject() ) ) |
| { |
| throw new UnsupportedCompilationException( |
| "And expression can't be compiled until all conditions are true." ); |
| } |
| |
| if ( !OgnlRuntime.isBoolean( first ) && !context.getCurrentType().isPrimitive() ) |
| { |
| first = OgnlRuntime.getCompiler( context ).createLocalReference( context, first, context.getCurrentType() ); |
| } |
| |
| String second = OgnlRuntime.getChildSource( context, target, children[1] ); |
| if ( !OgnlRuntime.isBoolean( second ) && !context.getCurrentType().isPrimitive() ) |
| { |
| second = OgnlRuntime.getCompiler( context ).createLocalReference( context, second, context.getCurrentType() ); |
| } |
| |
| result += format( "(org.apache.commons.ognl.OgnlOps.booleanValue(%s) ? ($w) (%s) : ($w) (%s))", first, second, first ); |
| |
| context.setCurrentObject( target ); |
| context.setCurrentType( Object.class ); |
| } |
| catch ( NullPointerException e ) |
| { |
| |
| throw new UnsupportedCompilationException( "evaluation resulted in null expression." ); |
| } |
| catch ( Throwable t ) |
| { |
| throw OgnlOps.castToRuntime( t ); |
| } |
| |
| return result; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.apache.commons.ognl.ExpressionNode#toSetSourceString(org.apache.commons.ognl.OgnlContext, java.lang.Object) |
| */ |
| public String toSetSourceString( OgnlContext context, Object target ) |
| { |
| if ( children.length != 2 ) |
| { |
| throw new UnsupportedCompilationException( "Can only compile boolean expressions with two children." ); |
| } |
| |
| String pre = (String) context.get( "_currentChain" ); |
| if ( pre == null ) |
| { |
| pre = ""; |
| } |
| |
| String result = ""; |
| |
| try |
| { |
| |
| if ( !OgnlOps.booleanValue( children[0].getValue( context, target ) ) ) |
| { |
| throw new UnsupportedCompilationException( |
| "And expression can't be compiled until all conditions are true." ); |
| } |
| |
| String first = |
| ExpressionCompiler.getRootExpression( children[0], context.getRoot(), context ) + pre |
| + children[0].toGetSourceString( context, target ); |
| |
| children[1].getValue( context, target ); |
| |
| String second = |
| ExpressionCompiler.getRootExpression( children[1], context.getRoot(), context ) + pre |
| + children[1].toSetSourceString( context, target ); |
| |
| if ( !OgnlRuntime.isBoolean( first ) ) |
| { |
| result += "if(org.apache.commons.ognl.OgnlOps.booleanValue(" + first + ")){"; |
| } |
| else |
| { |
| result += "if(" + first + "){"; |
| } |
| |
| result += second; |
| result += "; } "; |
| |
| context.setCurrentObject( target ); |
| context.setCurrentType( Object.class ); |
| |
| } |
| catch ( Throwable t ) |
| { |
| throw OgnlOps.castToRuntime( t ); |
| } |
| |
| return result; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.apache.commons.ognl.Node#accept(org.apache.commons.ognl.NodeVisitor, java.lang.Object) |
| */ |
| public <R, P> R accept( NodeVisitor<? extends R, ? super P> visitor, P data ) |
| throws OgnlException |
| { |
| return visitor.visit( this, data ); |
| } |
| } |