| 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; |
| |
| public abstract class ExpressionNode |
| extends SimpleNode |
| { |
| |
| private static final long serialVersionUID = 9076228016268317598L; |
| |
| public ExpressionNode( int i ) |
| { |
| super( i ); |
| } |
| |
| public ExpressionNode( OgnlParser p, int i ) |
| { |
| super( p, i ); |
| } |
| |
| /** |
| * Returns true iff this node is constant without respect to the children. |
| */ |
| @Override |
| public boolean isNodeConstant( OgnlContext context ) |
| throws OgnlException |
| { |
| return false; |
| } |
| |
| @Override |
| public boolean isConstant( OgnlContext context ) |
| throws OgnlException |
| { |
| boolean result = isNodeConstant( context ); |
| |
| 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] ).isConstant( context ); |
| } |
| else |
| { |
| result = false; |
| } |
| } |
| } |
| return result; |
| } |
| |
| public String getExpressionOperator( int index ) |
| { |
| throw new RuntimeException( "unknown operator for " + OgnlParserTreeConstants.jjtNodeName[id] ); |
| } |
| |
| @Override |
| public String toGetSourceString( OgnlContext context, Object target ) |
| { |
| StringBuilder result = |
| new StringBuilder( |
| ( parent == null || NumericExpression.class.isAssignableFrom( parent.getClass() ) ) ? "" : "(" ); |
| |
| if ( ( children != null ) && ( children.length > 0 ) ) |
| { |
| for ( int i = 0; i < children.length; ++i ) |
| { |
| if ( i > 0 ) |
| { |
| result.append( " " ).append( getExpressionOperator( i ) ).append( " " ); |
| } |
| |
| String value = children[i].toGetSourceString( context, target ); |
| |
| if ( ( ASTProperty.class.isInstance( children[i] ) || ASTMethod.class.isInstance( children[i] ) |
| || ASTSequence.class.isInstance( children[i] ) || ASTChain.class.isInstance( children[i] ) ) |
| && value != null && !value.trim().isEmpty() ) |
| { |
| |
| String pre = null; |
| if ( ASTMethod.class.isInstance( children[i] ) ) |
| { |
| pre = (String) context.get( "_currentChain" ); |
| } |
| |
| if ( pre == null ) |
| { |
| pre = ""; |
| } |
| |
| String cast = (String) context.remove( ExpressionCompiler.PRE_CAST ); |
| if ( cast == null ) |
| { |
| cast = ""; |
| } |
| |
| value = |
| cast + ExpressionCompiler.getRootExpression( children[i], context.getRoot(), context ) + pre |
| + value; |
| } |
| |
| result.append( value ); |
| } |
| } |
| |
| if ( parent != null && !NumericExpression.class.isAssignableFrom( parent.getClass() ) ) |
| { |
| result.append( ")" ); |
| } |
| |
| return result.toString(); |
| } |
| |
| @Override |
| public String toSetSourceString( OgnlContext context, Object target ) |
| { |
| StringBuilder sourceStringBuilder = new StringBuilder( parent == null ? "" : "(" ); |
| |
| if ( ( children != null ) && ( children.length > 0 ) ) |
| { |
| for ( int i = 0; i < children.length; ++i ) |
| { |
| if ( i > 0 ) |
| { |
| sourceStringBuilder.append( " " ).append( getExpressionOperator( i ) ).append( ' ' ); |
| } |
| |
| sourceStringBuilder.append( children[i].toSetSourceString( context, target ) ); |
| } |
| } |
| if ( parent != null ) |
| { |
| sourceStringBuilder.append( ")" ); |
| } |
| |
| return sourceStringBuilder.toString(); |
| } |
| } |