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The coolest XML library for Java around. Define typesafe views (projections) to xml. Use XPath to read and write XML. Bind XML to Java collections. Requires at least Java6, supports Java8 features and has no further runtime dependencies.

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/**
 *  Copyright 2014 Sven Ewald
 *
 *  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.xmlbeam;

import java.io.Serializable;
import java.lang.reflect.Method;
import java.util.Arrays;

/**
 * Temporary class to map between method calls and invocation handlers. TODO: Replace with better
 * performing string representation
 *
 * @author sven
 */
class MethodSignature implements Serializable {

    @Override
    public String toString() {
        return "MethodSignature [name=" + name + ", paramTypes=" + Arrays.toString(paramTypes) + "]";
    }

    private final Class[] paramTypes;
    private final String name;

    public static MethodSignature forVoidMethod(final String name) {
        return new MethodSignature(name, new Class[] {});
    }

    public static MethodSignature forSingleParam(final String name, final Class singleParam) {
        return new MethodSignature(name, new Class[] { singleParam });
    }

    public static MethodSignature forMultipleParams(final String name, final Class[] params) {
        return new MethodSignature(name, params);
    }

    /**
     * @param method
     */
    private MethodSignature(final Method method) {
        this.name = method.getName();
        this.paramTypes = method.getParameterTypes();
    }

    /**
     */
    private MethodSignature(final String name, final Class[] paramTypes) {
        this.paramTypes = paramTypes;
        this.name = name;
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = (prime * result) + ((name == null) ? 0 : name.hashCode());
        result = (prime * result) + Arrays.hashCode(paramTypes);
        return result;
    }

    @Override
    public boolean equals(final Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        MethodSignature other = (MethodSignature) obj;
        if (name == null) {
            if (other.name != null) {
                return false;
            }
        } else if (!name.equals(other.name)) {
            return false;
        }
        if (!Arrays.equals(paramTypes, other.paramTypes)) {
            return false;
        }
        return true;
    }

    public static MethodSignature forMethod(final Method m) {
        return new MethodSignature(m);
    }

    /**
     * Creates a copy of this signature with a different name. Use this to override another method
     * with same parameters.
     *
     * @param name
     *            Name of method that is overriden.
     * @return Method signature with different name.
     */
    public MethodSignature overridenBy(final String name) {
        return new MethodSignature(name, this.paramTypes);
    }

}