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'DatabeneScript' is an open source software library for resolving Java-like script expressions, written by Volker Bergmann.
/*
* (c) Copyright 2007-2011 by Volker Bergmann. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, is permitted under the terms of the
* GNU General Public License.
*
* For redistributing this software or a derivative work under a license other
* than the GPL-compatible Free Software License as defined by the Free
* Software Foundation or approved by OSI, you must first obtain a commercial
* license to this software product from Volker Bergmann.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* WITHOUT A WARRANTY OF ANY KIND. ALL EXPRESS OR IMPLIED CONDITIONS,
* REPRESENTATIONS AND WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE
* HEREBY EXCLUDED. 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.databene.script.expression;
import org.databene.commons.ArrayFormat;
import org.databene.commons.ArrayUtil;
import org.databene.script.Expression;
/**
* Expression that evaluates the results of other Expressions.
*
* Created: 18.06.2007 17:02:17
* @author Volker Bergmann
*/
public abstract class CompositeExpression implements WrapperExpression {
protected String symbol;
protected Expression[] terms;
protected CompositeExpression(Expression... terms) {
this(null, terms);
}
protected CompositeExpression(String symbol, Expression... terms) {
this.symbol = symbol;
this.terms = terms;
}
public Expression[] getTerms() {
return terms;
}
public Expression[] getSourceExpressions() {
return getTerms();
}
public void addTerm(Expression term) {
this.terms = ArrayUtil.append(term, this.terms);
}
public boolean isConstant() {
for (Expression term : terms)
if (!term.isConstant())
return false;
return true;
}
@Override
public String toString() {
return "(" + ArrayFormat.format(" " + symbol + " ", terms) + ")";
}
}