/**
* Copyright 2007-2015, Kaazing Corporation. All rights reserved.
*
* 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.kaazing.k3po.lang.internal.ast.matcher;
import static java.lang.String.format;
import static org.kaazing.k3po.lang.internal.ast.util.AstUtil.equivalent;
import javax.el.ValueExpression;
import org.kaazing.k3po.lang.internal.ast.AstRegion;
import org.kaazing.k3po.lang.internal.el.ExpressionContext;
public class AstVariableLengthBytesMatcher extends AstValueMatcher {
private final ValueExpression length;
private final String captureName;
private final ExpressionContext environment;
public AstVariableLengthBytesMatcher(ValueExpression length, ExpressionContext environment) {
this(length, null, environment);
}
public AstVariableLengthBytesMatcher(ValueExpression length, String captureName, ExpressionContext environment) {
this.length = length;
this.captureName = captureName;
this.environment = environment;
}
public ValueExpression getLength() {
return length;
}
public String getCaptureName() {
return captureName;
}
@Override
protected int hashTo() {
int hashCode = getClass().hashCode();
if (length != null) {
hashCode <<= 4;
hashCode ^= length.hashCode();
}
if (captureName != null) {
hashCode <<= 4;
hashCode ^= captureName.hashCode();
}
return hashCode;
}
@Override
protected boolean equalTo(AstRegion that) {
return that instanceof AstVariableLengthBytesMatcher && equalTo((AstVariableLengthBytesMatcher) that);
}
protected boolean equalTo(AstVariableLengthBytesMatcher that) {
return equivalent(this.length, that.length) && equivalent(this.captureName, that.captureName);
}
@Override
public <R, P> R accept(Visitor<R, P> visitor, P parameter) throws Exception {
return visitor.visit(this, parameter);
}
@Override
protected void describe(StringBuilder buf) {
if (captureName != null) {
buf.append(format("([0..%s]:%s)", length.getExpressionString(), captureName));
} else {
buf.append(format("[0..%s]", length.getExpressionString()));
}
}
public ExpressionContext getEnvironment() {
return environment;
}
}